sadler



Feb. 16, 1960 J. H. SADLER STARTING TORCH FOR LIQUID FUEL BURNER FiledJan. 13, 1956 2@mnmnuunumum F I G. 3 V nvmvrok.

JOHN H. SAOLER' 7 BY 9 ATTORNEY United States Patent STARTING TORCH FORLIQUID FUEL BURNER John H. Sadler, Hartford, Conn.

Application January 13, 1956, Serial No. 559,072

3 Claims. (Cl. 158-76) My invention relates to apparatus for burningliquid fuel and more particularly to providing starting torch meansparticularly for stoves, heaters and furnaces wherein it is desirable toavoid smoke and smell yet to use liquid fuel less expensive thangasoline, alcohol etc.

Among the purposes and objects of my invention are to provide a torchwherein a small quantity of kerosene or furnace oil is vaporized andignited by a match or the like which in turn heats a larger generator orvaporizing means to supply gas or vapor to one or more burners all asmore particularly disclosed and claimed in my co-pending patentapplication Serial Number 450,723, filed August 18, 1954, now abandoned.

An object is to provide a torch for fuel oil which uses a mixture of airand oil for atomization so that the torch is instantly started, whencold, by a lighted match.

I accomplish these and other objects by the construction hereindescribed and shown in the drawings, which form a part of this, mydisclosure.

In the drawings:

Fig. 1 is a top plan view of my oil stove, from which the top has beenremoved to show the interior parts.

Fig. 2 is a vertical section through my torch, as at 22, Fig. 1. I

Fig. 3 is an enlarged sectional detail of the oil and air helicalchannel or passage of the torch.

The torch surround is threaded and the torch valve stem is threadedsulficiently less in diameter to provide a helical passage.

Igniting cold fuel, or heating the fuel oil and mixing it with air toprovide a spray which may be ignited is accomplished by my startingtorch. Heat is instantly supplied by a match and the parts are of a sizeand shape as well as made of material of high conductivity so that thematch provides enough heat to start the torch, which once startedprovides sufficient heat to keep generating gas from oil, in'much themanner gasoline is started and burned in a gasoline blow torch. Amixture of air and oil is passed through a passage having a helical formand the mixture is atomized by being forced at high velocity through theneedle valve at the opposite end of said passage from whence the oil andair enter.

A fuel tank and air pump provide both air and oil under pressure, theair and its passage are connected to the top of the tank and the oil andits passage are connected through a strainer at the bottom of the tank;the

oil passage and the air connection communicate with the helical passageto provide a mixtureof air and oil for movement in said passage towardthe tip of the torch. The torch may be directed against the side of agenerator tube to heat it to a degree required for generating thequantity of vapor required for operation of one of several burners. Theburner may in turn supply the heat required to heat said generator tubefor continuous operation, thus permitting the torch to be shutoff.

As shown in Fig. 1, a stove 1 having burners 2, 3 is supplied withcombustible vapor from a generator 4 by way of a gas tube 5 and branchgas tubes 6, 7.

The torch 8 is supplied with oil and air from the pressure fuel tank 9which also supplies oil to the generator 4. Air pressure is produced bythe pump 10 to force air and oil to the generator 4 and the torch 8.

At the front of the stove I have provided the filling pipe 11, which isprovided with a safety valve and closure 12 for relieving excesspressure and for filling the tank with oil, space being provided at thetop of the tank for air as at 13. The torch control valve handle 14, thegenerator control valve handle 15, and the gas burner control valvehandle 16 are secured to their respective valve stems 18, 19 and 17.Each of the valve stems are regulated by rotating their respective valvehandles as operators. The valve stem 13 is threaded as at 32 for thepurpose, hereinafter more fully described. The valve stem 17 controlsthe amount of gas supplied to burner 2 by the valve 22 which is raisedor lowered with respect to the seat at the end of the respective branchpipe 7 by bellcrank connection 23.

Referring particularly to Fig. 2 I have shown the valve stem 18 of thetorch as passing through the packing nut 2 gland 25, packing 26,stopwasher 27 and into the chamber 28 which is counterbored to receivethe projecting ends 29 of the travel stop pin which is transverselyfixed tightly in the valve stem and which engages the washer 27 to limitthe outward travel of the valve stem as when the valve is opened;however by removing the packing nut 24 as well as the other parts,including the washer 27, the valve stem may be further unscrewed andremoved entirely from its surround and inlet fitting or tubular body 39,which is threaded internally for a substantial part of its length as at39a to receive the threaded portion 32 of the valve stem 18.

It will be apparent from Fig. 3 that the threads 30a, 32

of the fitting 30 and the valve stem 18, respectively, are suflicientlyloose to provide the helical channel or passage 2% yet serve to feed thevalve stem axially to control the oil and air to the fine atomizingorifice 33 which receives the needle 34 which is secured to the valvestem 18 at the center of the valve 35 which seats around the needleagainst the seat 36 in the atomizer 37. Around the valve 35 is themixing chamber 38 into which the end of the helical channel 2%terminates, whirling the mixture of oil and air or gas mixture as itenters the orifice 33 under pressure.

The atomizer 37 is secured at one end to the fitting 30 by the threads39 and at its opposite end to the ignition tube 46 by the threads 41 andis provided with the atomizing chamber 42 which is adjacent the slit 43of the ignition tube, which also is provided with other air openings 44and the open end as is customary with blow torches.

The fitting 30 is provided with the inlet extension 45 which isconnected to the top of the tank 9 by the fitting 46 which is threadedto engage the compression nut 47 and ring 48. The inlet extension 45 isprovided with the air inlet duct 49 which connects the top of the tankwith the helical passage and channel 20 and also with the oil inlet duct50 into which is secured the oil tube 51 and strainer 52 which connectsthe bottom 0'1. the tank with the helical channel and passage 20 at aposition as at 53 ahead of the air connection. Thus, the air will mixwith the oil in its travel to the mixing chamber 38, valve seat, needle,atomizing chamber and on out of the ignition tube 4d as a flame,directed to heat the generator.

The threads on the spindle or valve stem 18 and in the surround orfitting 39 may be a single thread or multiple threads and the degree oflooseness may vary to suit the size of the channel desired. As the stemis rotated the threads of one of the parts may engage and rub thethreads of the other part, as shown by the broken lines and thus may beseldom in the central position as shown in full lines; the relativespace which provides the long helical invention what I claim as new anddesire to secure by Letters Patent is set forth in the following claims:

1. A. burner adapted for use with liquid fuels such as kerosene having arelatively high flash point comprising a-tubular burner body having anelongated internally threaded wall portion, an elongated rod received insaid wallportion and provided with a shallow helical groove onrtheexterior thereof having a relatively small pitch and extendingcoaxiallyof the rod, said rod being in threaded engagement with the threaded wallportion of said body, saidbody-beingprovided with a pair of passagewayscommunicating at one end with said groove adjacent one end thereof andbeing adapted to be connected respectively atitheir' other ends to asource of fuel and air under pressure, the threaded portions of saidbody and rod forming an. elongated helical passageway having a crosssection sufiiciently small to efifect vaporization of fuel introducedthrough one of said pair of passageways as the fuel is forced throughsaid helical passageway along with air introduced under pressure throughthe other of said pair of passageways, saidrod being rotatable relativeto said body, and-an atomizing head on said body having an ori- -ficeinflow communication with the other end of said body,.said threadedportionslforming an elongated helical passageway, said body having apair of passageways communicating at one end with said helicalpassageway adjacent one end thereof and being adapted to be connected attheir other ends respectively to a source of fuel andzair'underpressure, an atomizing head on said body havingtan orifice'in flowcommunicaiton with the other 4, end of said helical passageway and meanson said rod receivable in said orifice for regulating the size thereofupon axial movement of said. rod.

3. A burner adapted for use with liquid fuels such as kerosenecomprising a burner body having an elongated internally threaded tubularwall portion, an elongated externally threaded rod loosely threadablyengaged in said threaded wall portion to provide an elongated narrowhelical passage,imeans between saidrod and body sealing one end of saidhelical passage, said body having an air supply passagewaycornmunicatingat one end with said helical passage adjacentsa'id one end thereof andadapted to be connected at its other end to a source of air underpressure, said body further being provided with a fuel supply passagewaycommunicating at one end with said helical passage adjacent said one endof the air supply passageway and intermediate said air supply passagewayand the other end of said helical passage and adapted to be connected atits other end to asource of fuel under pressure, and an atomizing headon said body having an orifice in flow communication with said other endof'said mixing passage.

References Cited in the file of this patent UNITED STATES PATENTS669,757 Mack Mar. 12, 1901 910,685 Hubert Jan. 26, 1909 1,039,297 KunkelSept. 24, 1912 1,403,215 Wheelock Jan. 10, 1922 1,483,634 Guelbaum Feb.12, 1924 1,696,069 Wood Dec. 18, 1928 1,887,140 Risinger Nov. 8, 19321,896,782 Meyer Feb. 7, 1933 1,945,934 Dollin et a1 a Feb. 6, 19342,212,004 Berthiaume et al Aug. 20, 1940 2,233,770 Campbell Mar. 4, 19412,321,034 Lieber June 8, 1943 2,321,169 Tullis June 8,- 1943

